EFFECT OF OUTGASSING TREATMENTS ON THE SURFACE REACTIVITY OF RH CEO2 CATALYSTS - CO ADSORPTION/

Authors
SORIA J MARTINEZARIAS A FIERRO JLG CONESA JC
Citation
J. Soria et al., EFFECT OF OUTGASSING TREATMENTS ON THE SURFACE REACTIVITY OF RH CEO2 CATALYSTS - CO ADSORPTION/, Vacuum, 46(8-10), 1995, pp. 1201-1204
Citations number
16
Categorie Soggetti
Physics, Applied
Journal title
Vacuum → ACNP
ISSN journal
0042207X
Volume
46
Issue
8-10
Year of publication
1995
Pages
1201 - 1204
Database
ISI
SICI code
0042-207X(1995)46:8-10<1201:EOOTOT>2.0.ZU;2-A
Abstract
XPS, ESR and IR spectroscopy have been used to study changes on the su rface of a Rh/CeO2 catalyst induced by thermal treatments under vacuum and subsequent CO adsorption. IR spectra of adsorbed CO confirm the p resence of Rh+ and the formation of Rh-O indicated by XPS. ESR spectra show the reduction of some rhodium ions, particularly at the rhodium oxide-cerium oxide boundary, during CO adsorption, favoured by the rea ction of CO with the support to form carbonates.